Amphastar Pharmaceuticals (AMPH) Shares Outstanding (Diluted) (2013 - 2026)
Amphastar Pharmaceuticals' Shares Outstanding (Diluted) came in at 44.23 million for Q2 2026, down 8.1% from 48.13 million a year earlier and down 4.8% from the prior quarter.
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Analysis
Amphastar Pharmaceuticals (AMPH) Shares Outstanding (Diluted) (2013 - 2026) Analysis & Trends
For FY2025, Amphastar Pharmaceuticals' Shares Outstanding (Diluted) was 48.22 million, down 7.4% from FY2024.
- Shares Outstanding (Diluted) carries a five-year compound annual growth rate of -0.4% (FY2020 to FY2025).
- Going back by year, Shares Outstanding (Diluted) was 52.06 million in FY2024 (-1.8%), 53 million in FY2023 (+1.1%), 52.43 million in FY2022 (+5.3%) and 49.78 million in FY2021 (+1.3%).
- The Q2 2026 figure represents the lowest quarterly Shares Outstanding (Diluted) since Q4 2014.
- Year-over-year, Shares Outstanding (Diluted) has declined for nine consecutive quarters, with an average decline of 6.2% over the last eight quarters.
- The fastest year-over-year change in Shares Outstanding (Diluted) over five years came in Q2 2022 (growth of 7.4%), and the weakest in Q2 2026 (a decline of 8.1%).
- Business Quant data shows AMPH's Shares Outstanding (Diluted) at 46.46 million (Q1 2026), 48.22 million (Q4 2025) and 47.68 million (Q3 2025) in the three quarters before Q2 2026.
Peer Set
Peer Comparison
| # | Company | Market Cap | Enterprise Value | Gross Profit (Qtr) | Shares Outstanding (Dil.) (Qtr) |
|---|---|---|---|---|---|
| 1 | Johnson & Johnson | 638.12 Bn | 556.64 Bn | 17.26 Bn | 2.44 Bn |
| 2 | AbbVie | 462.60 Bn | 435.75 Bn | 12.70 Bn | 1.77 Bn |
| 3 | Merck | 358.70 Bn | 313.13 Bn | 12.21 Bn | 2.47 Bn |
| 4 | Novartis Ag | 272.16 Bn | 228.03 Bn | 11.24 Bn | 1.96 Bn |
| 5 | Astrazeneca | 250.36 Bn | 223.92 Bn | 12.86 Bn | 1.56 Bn |
| 6 | Amgen | 227.87 Bn | 183.27 Bn | 7.24 Bn | 544.00 Mn |
| 7 | Gilead Sciences | 184.97 Bn | 159.08 Bn | 6.22 Bn | 1.24 Bn |
| 8 | Pfizer | 162.61 Bn | 109.56 Bn | 10.94 Bn | 5.70 Bn |
| 9 | Vertex Pharmaceuticals | 132.45 Bn | 104.46 Bn | 2.84 Bn | 255.20 Mn |
| 10 | Amphastar Pharmaceuticals | 1.10 Bn | -43.34 Mn | 93.47 Mn | 44.23 Mn |
Historic Data
Download Data
Historic Data
| Date | Value |
|---|---|
| Jun 30, 2026 | 44.23 Mn |
| Mar 31, 2026 | 46.46 Mn |
| Dec 31, 2025 | 48.22 Mn |
| Sep 30, 2025 | 47.68 Mn |
| Jun 30, 2025 | 48.13 Mn |
| Mar 31, 2025 | 49.89 Mn |
| Dec 31, 2024 | 52.06 Mn |
| Sep 30, 2024 | 51.86 Mn |
| Jun 30, 2024 | 52.05 Mn |
| Mar 31, 2024 | 53.01 Mn |
| Dec 31, 2023 | 53.00 Mn |
| Sep 30, 2023 | 53.92 Mn |
| Jun 30, 2023 | 53.10 Mn |
| Mar 31, 2023 | 51.97 Mn |
| Dec 31, 2022 | 52.43 Mn |
| Sep 30, 2022 | 52.79 Mn |
| Jun 30, 2022 | 53.23 Mn |
| Mar 31, 2022 | 51.98 Mn |
| Dec 31, 2021 | 49.78 Mn |
| Sep 30, 2021 | 50.01 Mn |
API Access
Amphastar Pharmaceuticals Shares Outstanding (Diluted) API
Pull this series into your own models, spreadsheets and apps with the Business Quant
Historical Metrics API. The request below matches the chart above — change the
frequency, period or values and it follows. Swap YOUR_API_KEY for your own key.
https://data.businessquant.com/historic?slug=shares-outstanding-diluted&ticker=AMPH&period=max&api_key=YOUR_API_KEYimport requests
url = "https://data.businessquant.com/historic"
params = {"slug": "shares-outstanding-diluted", "ticker": "AMPH", "period": "max", "api_key": "YOUR_API_KEY"}
data = requests.get(url, params=params).json()const res = await fetch("https://data.businessquant.com/historic?slug=shares-outstanding-diluted&ticker=AMPH&period=max&api_key=YOUR_API_KEY");
const data = await res.json();